Changes between Version 7 and Version 8 of WARPLab/AGC
- Timestamp:
- Nov 9, 2015, 11:57:17 AM (8 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
WARPLab/AGC
v7 v8 7 7 == Gain Selection based on RSSI and Received I/Q == 8 8 9 The [https://datasheets.maximintegrated.com/en/ds/MAX2828-MAX2829.pdf MAX2829] transceiver in WARP's radios has two stages of Rx gain: a low noise amplifier (LNA) that can provide up to 30 dB of amplification followed by a baseband gain that can provide up to 63 dB of additional amplification. Together, these gain stages can provide up to 153 dB of gain to a received signal: a multiplicative factor of around 10^15^ the power of the minimum gain selection. The AGC core provided with WARPLAB selects these two gains in three sequential stages:9 The [https://datasheets.maximintegrated.com/en/ds/MAX2828-MAX2829.pdf MAX2829] transceiver in WARP's radios has two stages of Rx gain: a low noise amplifier (LNA) that can provide up to 30 dB of amplification followed by a baseband gain that can provide up to 63 dB of additional amplification. Together, these gain stages can provide up to 93 dB of gain to a received signal. The AGC core provided with WARPLAB selects these two gains in three sequential stages: 10 10 11 11 1. When triggered, the AGC first selects an LNA gain based upon the RSSI signal provided by the transceiver. It does this by first converting the digital RSSI measurement into an receive power estimate in dBm. With this value, the AGC chooses one of the three possible LNA gain settings that minimizes EVM. The [https://datasheets.maximintegrated.com/en/ds/MAX2828-MAX2829.pdf MAX2829 datasheet] provides graphs that show EVM for each LNA gain setting as a function of receive power.
